Methods: 26 patients with pollen induced rhinoconjunctivitis and positive history for more than two years were included in our study. They had skin prick test of ≥ 5 mm, age range from 18-44 years and all underwent conjunctiva provocation tests before and after one year of SIT. Clinical severity score of nasal and conjunctiva symptoms during the season was assessed by 4-point arbitrary rating scale from 0-3. Conjunctiva provocations were performed out of the season until allergic symptoms occurred, achieving the allergen threshold dose (ATD).
Results: After one year of SIT, we have noticed reduction of clinical symptoms present in allergic conjunctivitis: burning, itching, lacrimation and hyperemia (p<0,05). We have found also reduction in clinical symptoms of allergic rhinitis: secretion, irritation, itching and nasal blockade (p<0,01). The patients tolerated significantly higher allergen doses in provocation tests after one year of SIT, reaching new ATD.
Conclusions: SIT reduces the clinical symptoms of allergic rhinoconjunctivitis and modifies the inflammatory response after specific allergen challenge.